Earth-moving scraper bowl



June 26, 1951 E. BAlN EARTH-MOVING SCRAPER BOWL Filed March 14, 1949 Patented June 26, 1951 v y 2,558,531, Y EA T I-LMOVING SCRAPEB BOW 1. r v '7 Edward Bain, Vauxhall, Alberta,1Canada Application March 14, 1949, Serial No. 81,362 In Canada July 9, 1948 2 Claims. (Cl. 37-118) My invention relates to scrapers, moreparticularly having reference to a ground or earth scraper of a character providing a bowl and an apron for the bowl.

In the art to which the invention relates ground or dirt moving scrapers more usually employ a bowl to be dragged over the ground, and in some instances it has been proposed to provide a hood or apron for the bowl.

The present invention contemplates improvements in scrapers of this kind, that provides an apron adapted to co-operate with the bowl in loading the scraper by riding in front of the blade on the bowl to regulate the depth of the cut, and further to close the entrance to the bowl during travel of the scraper to the dumping place.

ingly to provide an earth'moving scraper of a character providing a bowl to be loaded and a cutting blade on the bowl, and an apron mounted on the bowl and adapted to form a closure for the bowl during travel of the loaded scraper and to be uncovered during the dumping operation.

A further object of the invention is to provide means in the apron for-cleaning the bowl during the dumping operation, and means in the bowl for simultaneously cleaning the apron during such dumping operation.

Other features and advantages of the invention will become apparent by reference to the accom panying description, taken in conjunction with the drawings wherein like characters of reference indicate like parts throughout the several views and wherein;

Fig. 1 is a perspective view of a scraper em bodying my improvements and shown with the hood in closing relation to the bowl, and also shown partly broken away. i

Fig. 2 shows a fragment of the body of the bowl. Having reference to the drawings, the scraper consists of a bowl and an apron mounted for cooperation as a unit. The bowl provides a curved body I with substantially semi-circular end plates 2 and 3, and a cross member 4 at the front. On the bowl 1 is secured a blade 5, this blade being fastened to the lower edge of the bowl by bolts 6, and the blade would provide a forward cutting edge.

The apron consists of a curved body portion 1 with end plates 8 and 9 to which attach inwardly directed trunnions l and H. The bowl provides slots I2 in which the trunnions are receivable during turning movement of the apron in relation to the bowl. It might be noted that the slots l2 are rearward of the points of balance or axis tion to each other, which would be about the pivots l6 and ll.

On the apron is a blade I3 attached on the trunnions In by arms [4 and 15. When the apron moves in rotating relation to the bowl the blade 13 is caused thereby to pass across the inner curved face of the bowl to dislodge any dirt adhering thereto. 7

On the cross member 4 is carried a blade l8 adapted, when the apron rotates in relation to the bowl, to bear against the inner face of the apron and clean any dirt off that may be adhering to the curved body of the apron.

The scraper would include draft or lift connections as is common in the art by which it would be attached in working relation to the power unit with which it is to be employed and the customary dump mechanism, all of which forms no part of the present invention, and these connections would be made to the bowl and apron as required to eifect movement thereof.

In the use of the scraper, during loading, the apron rides in its lowermost position in advance of the bowl, with the lower edge in spaced relation to the bowl, or as required. During the dumping operation the apron and bowl are constrained to move oppositely about the pivots at l6 and I1, and the blade l3 passing over the curved portion I of the bowl cleans off dirt therefrom. The blade is simultaneously moves across and cleans the inner curved face of the apron.

While I have herein disclosed a preferred embodiment of my invention, it is obvious that changes may be made in the construction and arrangement of parts, and in so far as such changes come within the spirit and scope of the invention as defined in the appended claims they would be considered a part hereof.

Having thus particularly described and ascertained the nature of my said invention, what I claim and wish to secure by Letters Patent is:

1. In a dirt scraper a bowl providing a curved body and end plates, an apron providing a curved body and end plates, said apron and bowl being adapted for mounting to rotate on a common axis relative to each other with the apron adapted to form a closure for the front of the bowl, a scraper transversely carried by the apron adapted to clean dirt from the curved body of the bowl during relative rotation of the apron and bowl, and a further scraper carried by the bowl adapted to dislodge dirt adhering to the curved body of the apron during such relative rotation of the apron and bowl.

2. In a dirt scraper a bowl providing a curved body open at the front and having side plates, the side plates having curved slots rearwardly of the axis of the bowl, an apron adapted for mounting to rotate about the axis of the bowl, said apron providing a curved body portion adapted to form a closure for the front of the bowl and said apron having trunnions receivable in the curvedslots of the bowl side plates during rotation of the apron and bowl in relation to each other, arms on the trunnions, a scraper blade carried by said arms adapted for cleaning the inner curved surface of the bowlwhen the bowl 1 a and apron are moved relative to each other, and

4 a further blade transversely carried by the bowl adapted for cleaning the inner curved surface of the apron during such relative movement thereof.

EDWARD BAIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 873,734 Desy Dec. 17, 1907 2380;439 =McLean Apr. 21, 1943 

